公开(公告)号：US20230070845A1

公开(公告)日：2023-03-09

申请号：US17987250

申请日：2022-11-15

Applicant: STMicroelectronics LTD

Inventor： Elik HARAN

IPC: H04N9/31 ,  H04N5/06

Abstract: A control system includes a mirror controller generating horizontal and vertical mirror synchronization signals for a mirror based upon a mirror clock signal. Laser modulation circuitry generates horizontal and vertical laser synchronization signals as a function of first and second laser clock signals and generates control signals for a laser that emits a laser beam that impinges on the mirror. First synchronization circuitry receives the horizontal mirror synchronization signal and the horizontal laser synchronization signal, and modifies generation of the first laser clock signal to achieve alignment between the horizontal mirror synchronization signal and horizontal laser synchronization signal. Second synchronization circuitry receives the vertical mirror synchronization signal and the vertical laser synchronization signal, and modifies generation of the second laser clock signal to achieve alignment between the vertical mirror synchronization signal and vertical laser synchronization signal.

公开(公告)号：US20200301127A1

公开(公告)日：2020-09-24

申请号：US16897491

申请日：2020-06-10

Applicant: STMicroelectronics LTD

Inventor： Elik HARAN ,  Offir DUVDEVANY ,  Naomi PETRUSHEVSKY

IPC: G02B26/08 ,  G01R19/04 ,  H02P25/032 ,  G02B26/10

Abstract: An electronic device includes an analog to digital converter receiving an analog mirror sense signal from an oscillating mirror and generating a digital mirror sense signal therefrom, and a digital signal processing block. The digital signal processing block cooperates with the analog to digital converter to take a first sample of the digital mirror sense signal at a first time where a derivative of capacitance of the digital mirror sense signal crosses zero, take a second sample of the digital mirror sense signal at a second time between a peak of the digital mirror sense signal and the first time, and take a third sample of the digital mirror sense signal at a third time after the digital mirror sense signal has reached a minimum. Control circuitry determines an opening angle of the oscillating mirror as a function of the first, second, and third samples.